//#define _CRT_SECURE_NO_WARNINGS
//#include<stdio.h>
//void* my_memcpy(void* dest, const void* scr, size_t num)
//{
//	void* ret = dest;
//	while (num--)
//	{
//		*(char*)dest = *(char*)scr;
//		dest = (char*)dest + 1;
//		scr = (char*)scr + 1;
//	}
//	return ret;
//}
//int main()
//{
//	int arr1[] = {1,2,3,4,5,6,7,8,9,10};
//	int arr2[] = {2,3,4,5,6,7,8,9,10,11};
//	int sz = sizeof(arr1) / sizeof(arr1[0]);
//	void* ret = my_memcpy(arr1, arr2, 15);
//	for (int i = 0; i < sz; i++)
//		printf("%d ",arr1[i]);
//	return 0;
//}